Control of multistability in a directly modulated diode laser

Pisarchik, Alexander N.; Кунцевич, Б. Ф.

doi:10.1109/jqe.2002.805110

Cited by 49 publications

(13 citation statements)

References 21 publications

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“…Note that the maximum value in the amplitude-frequency characteristic (response) may appear in the regions of either low-or the high-frequency local maxima. A similar multiresonance structure in the nonlinear response has been observed previously in some cases for other semiconductor laser systems [14,26,27]. The shapes and durations of the pulses at these local maxima do differ and this is of some practical interest.…”

supporting

confidence: 79%

Modulation response of dynamic single-mode quantum-well heterolasers in the 1.5 μm range

Кунцевич

Кононенко

2010

J Appl Spectrosc

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Numerical modelling is used to study the effect of tuning the laser output over the gain bandwidth on the modulation response of GaInAs-GaInAsP quantum-well heterolasers for different modulation frequencies of the pump current. It is found that the maximum frequency bandwidth of the response band and the greatest feasibility of high speed modulation for transmission of signals in information systems are achieved in the center of the gain band. Raising the dc component of the pump current increases the response bandwidth. For typical parameters of this system (near 1.5 μm) the maximum response bandwidth can approach ≈40 GHz.For certain parameters, the amplitude-frequency characteristics of the heterolasers have two local maxima: one at low frequency corresponding usually to a resonance for the 1/2 subharmonic and one at high frequency, for the fundamental resonance.Introduction. Solving a number of scientific and practical problems requires single-mode (single frequency) semiconductor lasers with a narrow and stable emission line. Furthermore, in a number of cases the frequency of the laser radiation must be tuned over a certain range within the confines of the gain band. As a rule, single frequency operation is obtained using an external dispersive cavity. For example, narrow band cw lasing (Δλ ≤ 0.15 nm) at an output power of up to 20 mW tuneable over an interval of ≈10 nm around the central wavelength of 884 nm has been obtained [1] in a GaAs-AlGaAs heterolaser with an external dispersive cavity at room temperature. Single frequency emission from a laser with stressed active layers (λ = 975 nm) and a cw power of >100 mW has been obtained [2] with suppression of side longitudinal modes at a level of >30 dB. It has been pointed out [3] that with the right position for the fixed axis of rotation of an external mirror, an injection laser can essentially be tuned continuously over its entire gain band. An external waveguide grating mirror has been used to obtain a significant narrowing (to 0.1 nm) of the output spectrum and it was shown that the output wavelength of a semiconductor laser can be tuned smoothly over a range of 10-18 nm [4].It has been noted [5] that one of the most important problems in fiber optic communications lines with channel spectral densification is the creation of laser sources with a narrow and stable spectrum (no more than 0.1 nm) that must be maintained in a dynamic regime with modulation of an information signal at frequencies up to 10 GHz. These requirements may correspond best to semiconductor lasers with external fiber Bragg gratings on single-mode fiber light guides. For GaInAsP-InP lasers the half width of the laser output spectrum with a fiber Bragg grating is no more than 0.1 nm with pulsed modulation of the pump current at a frequency of up to ≈5 GHz. Other features of the output parameters of single frequency semiconductor lasers are discussed in [6][7][8][9][10][11]. Methods of creating dynamic single-frequency semiconductor lasers that operate stably to generate a single longit...

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confidence: 79%

Modulation response of dynamic single-mode quantum-well heterolasers in the 1.5 μm range

Кунцевич

Кононенко

2010

J Appl Spectrosc

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“…It is known that when the modulation depth, for example, is increased for CO 2 lasers, the resonance frequency ν r decreases (the ν r 1 ⁄ 2 resonance does not usually appear) [11,19]. A reduction in the resonance frequency with increasing current modulation depth has also been found previously for several types of semiconductor lasers [10,11,16]. At the same time, it is clear from Fig.…”

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confidence: 74%

“…The frequency interval between the local maxima usually varies over a certain range when the modulation parameters are changed. A multiresonance structure in the nonlinear response also shows up in other types of semiconductor lasers [10,11,16,17].…”

mentioning

confidence: 82%

Effect of current modulation depth on the response of single-mode quantum-well heterolasers in the region of 1.5 μm

Кунцевич

Кононенко

2011

J Appl Spectrosc

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Numerical simulations are used to study the effect of pump current modulation depth on the response of quantum-well GaInAs-GaInAsP heterolasers at different lasing frequencies within the gain band as a function of the excess above threshold. It is shown that the amplitude-frequency characteristics of these laser emitters generally contain two local maxima. The low frequency maximum usually corresponds to a resonance for the 1/2 subharmonic and the high frequency maximum, to the fundamental. As the modulation depth is increased, the fundamental frequency decreases, while the resonance frequency for the 1/2 subharmonic can change monotonically or not. The behavior found here can be used to develop quantum-well heterolasers with specified modulation parameters.

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“…A similar result in a very different system is found in the genetic switch of [Hasty et al, 2000], which uses noise to control transitions in a bistable genetic system. It would be interesting to systematically explore the capability of this idea in physical systems, such as lasers [Pisarchik & Kuntsevich, 2002;Martinez-Zerega et al, 2003].…”

Section: Discussionmentioning

confidence: 99%

Diffusion, Intermittency, and Noise-Sustained Metastable Chaos in the Lorenz Equations: Effects of Noise on Multistability

Tung

Gao

et al. 2008

Int. J. Bifurcation Chaos

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Multistability is an interesting phenomenon of nonlinear dynamical systems. To gain insights into the effects of noise on multistability, we consider the parameter region of the Lorenz equations that admits two stable fixed point attractors, two unstable periodic solutions, and a metastable chaotic "attractor". Depending on the values of the parameters, we observe and characterize three interesting dynamical behaviors: (i) noise induces oscillatory motions with a well-defined period, a phenomenon similar to stochastic resonance but without a weak periodic forcing; (ii) noise annihilates the two stable fixed point solutions, leaving the originally transient metastable chaos the only observable; and (iii) noise induces hopping between one of the fixed point solutions and the metastable chaos, a three-state intermittency phenomenon.

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Control of multistability in a directly modulated diode laser

Cited by 49 publications

References 21 publications

Modulation response of dynamic single-mode quantum-well heterolasers in the 1.5 μm range

Modulation response of dynamic single-mode quantum-well heterolasers in the 1.5 μm range

Effect of current modulation depth on the response of single-mode quantum-well heterolasers in the region of 1.5 μm

Diffusion, Intermittency, and Noise-Sustained Metastable Chaos in the Lorenz Equations: Effects of Noise on Multistability

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